/* ===========================================================
* JFreeChart : a free chart library for the Java(tm) platform
* ===========================================================
*
* (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
*
* Project Info: http://www.jfree.org/jfreechart/index.html
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* -----------------
* ArcDialFrame.java
* -----------------
* (C) Copyright 2006, 2007, by Object Refinery Limited.
*
* Original Author: David Gilbert (for Object Refinery Limited);
* Contributor(s): -;
*
* Changes
* -------
* 03-Nov-2006 : Version 1 (DG);
* 08-Mar-2007 : Fix in hashCode() (DG);
* 17-Oct-2007 : Updated equals() (DG);
* 24-Oct-2007 : Added argument checks and API docs, and renamed
* StandardDialFrame --> ArcDialFrame (DG);
*
*/
package org.jfree.chart.plot.dial;
import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Paint;
import java.awt.Shape;
import java.awt.Stroke;
import java.awt.geom.Arc2D;
import java.awt.geom.Area;
import java.awt.geom.GeneralPath;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import org.jfree.chart.HashUtilities;
import org.jfree.io.SerialUtilities;
import org.jfree.util.PaintUtilities;
import org.jfree.util.PublicCloneable;
/**
* A standard frame for the {@link DialPlot} class.
*
* @since 1.0.7
*/
public class ArcDialFrame extends AbstractDialLayer implements DialFrame,
Cloneable, PublicCloneable, Serializable {
/** For serialization. */
static final long serialVersionUID = -4089176959553523499L;
/**
* The color used for the front of the panel. This field is transient
* because it requires special handling for serialization.
*/
private transient Paint backgroundPaint;
/**
* The color used for the border around the window. This field is transient
* because it requires special handling for serialization.
*/
private transient Paint foregroundPaint;
/**
* The stroke for drawing the frame outline. This field is transient
* because it requires special handling for serialization.
*/
private transient Stroke stroke;
/**
* The start angle.
*/
private double startAngle;
/**
* The end angle.
*/
private double extent;
/** The inner radius, relative to the framing rectangle. */
private double innerRadius;
/** The outer radius, relative to the framing rectangle. */
private double outerRadius;
/**
* Creates a new instance of <code>ArcDialFrame</code> that spans
* 180 degrees.
*/
public ArcDialFrame() {
this(0, 180);
}
/**
* Creates a new instance of <code>ArcDialFrame</code> that spans
* the arc specified.
*
* @param startAngle the startAngle (in degrees).
* @param extent the extent of the arc (in degrees, counter-clockwise).
*/
public ArcDialFrame(double startAngle, double extent) {
this.backgroundPaint = Color.gray;
this.foregroundPaint = new Color(100, 100, 150);
this.stroke = new BasicStroke(2.0f);
this.innerRadius = 0.25;
this.outerRadius = 0.75;
this.startAngle = startAngle;
this.extent = extent;
}
/**
* Returns the background paint (never <code>null</code>).
*
* @return The background paint.
*
* @see #setBackgroundPaint(Paint)
*/
public Paint getBackgroundPaint() {
return this.backgroundPaint;
}
/**
* Sets the background paint and sends a {@link DialLayerChangeEvent} to
* all registered listeners.
*
* @param paint the paint (<code>null</code> not permitted).
*
* @see #getBackgroundPaint()
*/
public void setBackgroundPaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.backgroundPaint = paint;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns the foreground paint.
*
* @return The foreground paint (never <code>null</code>).
*
* @see #setForegroundPaint(Paint)
*/
public Paint getForegroundPaint() {
return this.foregroundPaint;
}
/**
* Sets the foreground paint and sends a {@link DialLayerChangeEvent} to
* all registered listeners.
*
* @param paint the paint (<code>null</code> not permitted).
*
* @see #getForegroundPaint()
*/
public void setForegroundPaint(Paint paint) {
if (paint == null) {
throw new IllegalArgumentException("Null 'paint' argument.");
}
this.foregroundPaint = paint;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns the stroke.
*
* @return The stroke (never <code>null</code>).
*
* @see #setStroke(Stroke)
*/
public Stroke getStroke() {
return this.stroke;
}
/**
* Sets the stroke and sends a {@link DialLayerChangeEvent} to
* all registered listeners.
*
* @param stroke the stroke (<code>null</code> not permitted).
*
* @see #getStroke()
*/
public void setStroke(Stroke stroke) {
if (stroke == null) {
throw new IllegalArgumentException("Null 'stroke' argument.");
}
this.stroke = stroke;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns the inner radius, relative to the framing rectangle.
*
* @return The inner radius.
*
* @see #setInnerRadius(double)
*/
public double getInnerRadius() {
return this.innerRadius;
}
/**
* Sets the inner radius and sends a {@link DialLayerChangeEvent} to
* all registered listeners.
*
* @param radius the inner radius.
*
* @see #getInnerRadius()
*/
public void setInnerRadius(double radius) {
if (radius < 0.0) {
throw new IllegalArgumentException("Negative 'radius' argument.");
}
this.innerRadius = radius;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns the outer radius, relative to the framing rectangle.
*
* @return The outer radius.
*
* @see #setOuterRadius(double)
*/
public double getOuterRadius() {
return this.outerRadius;
}
/**
* Sets the outer radius and sends a {@link DialLayerChangeEvent} to
* all registered listeners.
*
* @param radius the outer radius.
*
* @see #getOuterRadius()
*/
public void setOuterRadius(double radius) {
if (radius < 0.0) {
throw new IllegalArgumentException("Negative 'radius' argument.");
}
this.outerRadius = radius;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns the start angle.
*
* @return The start angle.
*
* @see #setStartAngle(double)
*/
public double getStartAngle() {
return this.startAngle;
}
/**
* Sets the start angle and sends a {@link DialLayerChangeEvent} to
* all registered listeners.
*
* @param angle the angle.
*
* @see #getStartAngle()
*/
public void setStartAngle(double angle) {
this.startAngle = angle;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns the extent.
*
* @return The extent.
*
* @see #setExtent(double)
*/
public double getExtent() {
return this.extent;
}
/**
* Sets the extent and sends a {@link DialLayerChangeEvent} to
* all registered listeners.
*
* @param extent the extent.
*
* @see #getExtent()
*/
public void setExtent(double extent) {
this.extent = extent;
notifyListeners(new DialLayerChangeEvent(this));
}
/**
* Returns the shape for the window for this dial. Some dial layers will
* request that their drawing be clipped within this window.
*
* @param frame the reference frame (<code>null</code> not permitted).
*
* @return The shape of the dial's window.
*/
public Shape getWindow(Rectangle2D frame) {
Rectangle2D innerFrame = DialPlot.rectangleByRadius(frame,
this.innerRadius, this.innerRadius);
Rectangle2D outerFrame = DialPlot.rectangleByRadius(frame,
this.outerRadius, this.outerRadius);
Arc2D inner = new Arc2D.Double(innerFrame, this.startAngle,
this.extent, Arc2D.OPEN);
Arc2D outer = new Arc2D.Double(outerFrame, this.startAngle
+ this.extent, -this.extent, Arc2D.OPEN);
GeneralPath p = new GeneralPath();
Point2D point1 = inner.getStartPoint();
p.moveTo((float) point1.getX(), (float) point1.getY());
p.append(inner, true);
p.append(outer, true);
p.closePath();
return p;
}
/**
* Returns the outer window.
*
* @param frame the frame.
*
* @return The outer window.
*/
protected Shape getOuterWindow(Rectangle2D frame) {
double radiusMargin = 0.02;
double angleMargin = 1.5;
Rectangle2D innerFrame = DialPlot.rectangleByRadius(frame,
this.innerRadius - radiusMargin, this.innerRadius
- radiusMargin);
Rectangle2D outerFrame = DialPlot.rectangleByRadius(frame,
this.outerRadius + radiusMargin, this.outerRadius
+ radiusMargin);
Arc2D inner = new Arc2D.Double(innerFrame, this.startAngle
- angleMargin, this.extent + 2 * angleMargin, Arc2D.OPEN);
Arc2D outer = new Arc2D.Double(outerFrame, this.startAngle
+ angleMargin + this.extent, -this.extent - 2 * angleMargin,
Arc2D.OPEN);
GeneralPath p = new GeneralPath();
Point2D point1 = inner.getStartPoint();
p.moveTo((float) point1.getX(), (float) point1.getY());
p.append(inner, true);
p.append(outer, true);
p.closePath();
return p;
}
/**
* Draws the frame.
*
* @param g2 the graphics target.
* @param plot the plot.
* @param frame the dial's reference frame.
* @param view the dial's view rectangle.
*/
public void draw(Graphics2D g2, DialPlot plot, Rectangle2D frame,
Rectangle2D view) {
Shape window = getWindow(frame);
Shape outerWindow = getOuterWindow(frame);
Area area1 = new Area(outerWindow);
Area area2 = new Area(window);
area1.subtract(area2);
g2.setPaint(Color.lightGray);
g2.fill(area1);
g2.setStroke(this.stroke);
g2.setPaint(this.foregroundPaint);
g2.draw(window);
g2.draw(outerWindow);
}
/**
* Returns <code>false</code> to indicate that this dial layer is not
* clipped to the dial window.
*
* @return <code>false</code>.
*/
public boolean isClippedToWindow() {
return false;
}
/**
* Tests this instance for equality with an arbitrary object.
*
* @param obj the object (<code>null</code> permitted).
*
* @return A boolean.
*/
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (!(obj instanceof ArcDialFrame)) {
return false;
}
ArcDialFrame that = (ArcDialFrame) obj;
if (!PaintUtilities.equal(this.backgroundPaint, that.backgroundPaint)) {
return false;
}
if (!PaintUtilities.equal(this.foregroundPaint, that.foregroundPaint)) {
return false;
}
if (this.startAngle != that.startAngle) {
return false;
}
if (this.extent != that.extent) {
return false;
}
if (this.innerRadius != that.innerRadius) {
return false;
}
if (this.outerRadius != that.outerRadius) {
return false;
}
if (!this.stroke.equals(that.stroke)) {
return false;
}
return super.equals(obj);
}
/**
* Returns a hash code for this instance.
*
* @return The hash code.
*/
public int hashCode() {
int result = 193;
long temp = Double.doubleToLongBits(this.startAngle);
result = 37 * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.extent);
result = 37 * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.innerRadius);
result = 37 * result + (int) (temp ^ (temp >>> 32));
temp = Double.doubleToLongBits(this.outerRadius);
result = 37 * result + (int) (temp ^ (temp >>> 32));
result = 37 * result + HashUtilities.hashCodeForPaint(
this.backgroundPaint);
result = 37 * result + HashUtilities.hashCodeForPaint(
this.foregroundPaint);
result = 37 * result + this.stroke.hashCode();
return result;
}
/**
* Returns a clone of this instance.
*
* @return A clone.
*
* @throws CloneNotSupportedException if any attribute of this instance
* cannot be cloned.
*/
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
/**
* Provides serialization support.
*
* @param stream the output stream.
*
* @throws IOException if there is an I/O error.
*/
private void writeObject(ObjectOutputStream stream) throws IOException {
stream.defaultWriteObject();
SerialUtilities.writePaint(this.backgroundPaint, stream);
SerialUtilities.writePaint(this.foregroundPaint, stream);
SerialUtilities.writeStroke(this.stroke, stream);
}
/**
* Provides serialization support.
*
* @param stream the input stream.
*
* @throws IOException if there is an I/O error.
* @throws ClassNotFoundException if there is a classpath problem.
*/
private void readObject(ObjectInputStream stream)
throws IOException, ClassNotFoundException {
stream.defaultReadObject();
this.backgroundPaint = SerialUtilities.readPaint(stream);
this.foregroundPaint = SerialUtilities.readPaint(stream);
this.stroke = SerialUtilities.readStroke(stream);
}
}
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